get string from listbox and set it as variable

Hi, I have problem to get selection from listbox and set it as variable to read data I already set.The objective here is to plot my selection with my Y with a pushbutton. So, in my GUI: Under my listbox I set this:

set(handles.listbox1,'String',{'POP','ROCK'});

Under pushbutton I set this:

POP=[1 2 3 4];
  ROCK=[7 8 9 10];
  Y=[ 1 2 3 4];
  C = get(handles.listbox2,'String');
 M = get(handles.listbox2,'Value');
plot(C{M},Y);

In the end, matlab fails to recognize POP and ROCK that I already set. Is there any other option rather that I have to change the variable name POP into C{1} and etc?

Answer 1

[Walter Roberson]

POP=[1 2 3 4];
ROCK=[7 8 9 10];
C = {POP, ROCK};
M = get(handles.listbox2,'Value');
plot(C{M},Y);

Answer 2

[Jan]

plot(C{M},Y);

Now C{M} is the string 'ROCK' or 'POP', but not the corresponding variable. Using a struct might be useful:

Data.POP  = [1 2 3 4];
Data.ROCK = [7 8 9 10];
Y = [1 2 3 4];
C = get(handles.listbox2,'String');
M = get(handles.listbox2,'Value');
plot(Data.(C{M}), Y);

See "dynamic fieldnames" in the docs or in this forum.